/* ifdef.c -- 使用条件编译 */
#include <stdio.h>
//#define JUST_CHECKING
#define LIMIT 4

int mian(void)
{
    int i;
    int total = 0;

    for (size_t i = 1; i < LIMIT; i++)
    {
        total += 2 * i * i +1;
        #ifdef JUST_CHECKING
        printf("i=%d, running total = %d\n", i, total);
        #endif
    }
    printf("Grand total = %d\n", total);

    return 0;
}